English
resolutionist
From resolution + -ist.
A compound of resolution + -ist
Latin solvō ‘to loosen, untie’
Latin resolvō ‘to release, loosen’
Latin resolūtiō ‘untying, loosening’
Middle English resolucioun ‘dissolution’
English resolution
Today it means
noun One who makes a resolution.
Language periods are conventional ranges, not dates for this word.
Etymograph / resolutionist